Mammaliaformes Rowe 1988
   [crown] Class Mammalia Linnaeus, 1758 - mammals
     Subclass Theriiformes Rowe, 1988 see Division Theriiformes Rowe, 1988
       Infraclass Holotheria Wible, Rougier, Novacek, McKenna & Dashzeveg, 1995 see Clade Holotheria Wible, Rougier, Novacek, McKenna & Dashzeveg 1995
         Superlegion Trechnotheria McKenna, 1975 see Clade Trechnotheria McKenna 1975
           Legion Cladotheria McKenna, 1975 see Clade Cladotheria McKenna 1975
             Sublegion Zatheria McKenna, 1975 see Clade Zatheria McKenna 1975
               Infralegion Tribosphenida McKenna, 1975 see Subclass Boreosphenida Luo, Cifelli & Kielan-Jaworowska, 2001
                 [crown] Supercohort Theria Parker & Haswell, 1897 - therians see Subclass Theria Parker & Haswell, 1897
                   Cohort Placentalia Owen, 1837 - placentals
                     Magnorder Epitheria McKenna, 1975 see Cohort Placentalia Owen, 1837
                       Superorder Preptotheria McKenna, 1975
                         Grandorder Ungulata Linnaeus, 1766
                           Mirorder Altungulata Prothero & Schoch, 1989
                             Order Perissodactyla Owen, 1848 - odd-toed ungulates
                               Suborder Ceratomorpha Wood, 1937
                                 Infraorder †Selenida McKenna & Bell, 1997
                                   Superfamily †Brontotherioidea Marsh, 1873
                                     Family †Brontotheriidae Marsh, 1873
                                       Subfamily †Brontopinae Osborn, 1914
                                         01 Genus †Brachydiastematherium Boeckh & Maty, 1876
                                         02 Genus †Pachytitan Granger & Gregory, 1943
                                         03 Genus †Dianotitan Chow, Chang & Ting, 1974
                                         04 Genus †Gnathotitan Granger & Gregory, 1943
                                         05 Genus †Microtitan Granger & Gregory, 1943
                                         06 Genus †Epimanteoceras Granger & Gregory, 1943
                                         07 Genus †Protitan Granger & Gregory, 1943
                                         08 Genus †Rhinotitan Granger & Gregory, 1943
                                         09 Genus †Metatitan Granger & Gregory, 1943
                                         10 Genus †Dolichorhinoides Granger & Gregory, 1943
                                         11 Genus †Protitanotherium Hatcher, 1895
                                         12 Genus †Parabrontops Granger & Gregory, 1943
                                         13 Genus †Oreinotherium Russel, 1934
                                         14 Genus †Brontops Marsh, 1887
                                         15 Genus †Protitanops Stock, 1936
                                         16 Genus †Pygmaetitan Miao, 1982